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Unauthorized access is the use of a computer or network without permission. Unauthorized use is the use of a computer or its data for unapproved or possibly illegal activities.
breach
This is homework... First step for cyber security is a good firewall. For physical security you need access control (locked doors and card entry, ect).
firewall
breach
Breach
It means you television can access resources through LAN.
Physical access restrictions
LAN users get access to internet or can communicate with others LAN connected to WAN.
Most of modern access points can serve as a switch too. So the answer is yes, if your access point has lan ports.
Firewall
most pepole would says yes as you may want to do personal banking and such and is someone has access to your network you can be prone to someone peeking in to what you do online